Washington (CNN) - Sen. Bob Corker says his daughter is fine but "really sore" after being pulled from her car and thrown to the ground in a carjacking in the nation's capital.

The Tennessee Republican said his 22-year-old daughter, Julia, stopped the family's 2005 Chevrolet Tahoe not far from their apartment - just nine blocks from the U.S. Capitol building - to help someone she thought needed directions Wednesday night.

"A gentleman appeared, opened the door, grabbed her by the neck," the senator told CNN on Thursday. "She kicked to try to get away ... and he threw her on the pavement and drove away."

A short time later, two suspects were taken into custody in a parking lot in Seat Pleasant, Maryland. Corker credited the vehicle's OnStar service with helping to find it.

OnStar is a navigation and tracking system that General Motors installs in its new vehicles.